mills



T. MILLS.

Heating Stove.

N0. 411. I v Patented Sept. 25,.1837.

oi coal when used as fuel.

UNITED STATES PATENT OFFICE.

THOS. MILLS, OF HAVANA, NEW YORK.

CONSTRUCTION OF STOVES.

Specification of Letters Patent No. 411, dated September 25, 1837.

To all whom it may concern:

Be it known that I, THOMAS MILLS, of Havana, Chemung county, and Stateof New York, have invented a new and useful Improvement on the CommonBox- Stove for anning Apartments,

This improvement consists in dispensing with the common bottom platewhich is an extended hearth and substituting sunken narrow hearths A, Awhich serve as the bases of two'plates B, B, set in an angular positionthat meet at the top plate and form an air chamber C between them.vWithin a short distance from the lower edge of these inclined platesperpendicular side plates F, F of the ordinary construction support atop plate havin a space for the smoke pipe which is placec over the twochambers of combustion and being with or without apertures for thereception of vessels for cooking food or heating fluids or the admissionThese sides and top inclosing the inclined plates form chambers ofcombustion on the sides of the air chamber. The side plates are placedover the middle of the sunken hearths and the spaces between each sideplate and inclined plate are provided with grates D, D, of anyconstruction upon which the wood or other fuel is to be placed. Thedoors E, E and rear plate are made to correspond with the shape of theends of the chambers of combustion leaving the ends of the air chamberopen. On the inside of the perpendicular plates as well as on the sidesof the inclined plates opposite projections of metal G, G at suitabledistances are placed to facilitate the draft and to augment the heat.The whole can be supported by a common frame or legs.

Operation: Wood being placed in the chambers of combustion the weight ofwhich 7 I brings it against the projections of the plates it beingignited at the bottom the heat is forced against the plates through thespace created by the projections and continues to circulate with anincreased force of heat until it arrives above the uppermost sticks inthe chambers and then takes its direction to the pipe. By this operationa greater degree of heat is produced upon the plates than can beproduced from a like quantity of wood upon the plates of the common boXstove.

I do not wish to confine myself to the precise form of the various partsof this stove or to the inclination of the two in-;

side plates but to vary the same in any manner substantially the same inprinciple.

What I claim as my invention and desire to secure by Letters Patent, is

v1.. The making of two chambers of combustion by dividing the inside ofthe stove with two inclined plates, and leaving a space between themwhich is open at the bottom and ends through which the air circulatesand becomes rarefied.

2. I also claim the projections on the inside of the plates and thedouble sunken hearths in combination, all as above described.

THOMAS MILLS.

Witnesses:

J o. B. Wool),

THOMAS Canon.

